Biology GCE Unit 2 - 3rd June Thread

please could you answer this question?
http://www.thestudentroom.co.uk/showthread.php?t=2367560

Okay do you have the year of this paper, and question number, I'd like to see the whole thing.

Its june 2011, unit 2 AQA question 4)b)ii)

Well it requires 3 cell cycles.
In minutes 4 hours 18 minutes is 240 + 18 = 258.

So 258 x 3 = 744 minutes.

This is because there are two cells produced at the end of every cycle.
So by telophase two cells are made.

Now these two cells undergo mitosis again. Now four cells are produced as the two cells will produce double their original amount.

Then in the third circle the four cells will double and make eight cells.

So you know it is three cycles.
Now one cycle is 258 minutes.
So 258 (one cycle) x 3 (cycles) = 744 minutes.

You could convert it into hours which would be 12 hours and 54 minutes but I would stick to 744 minutes if I were you, just to be safe.

Yes a lot of thinking for this question but this question is aimed at a students and will get you thinking on your feet.

Let me know if I got the right answer.

Yeah it's the right answer, I understand it now. Thank you very much!

This thread is for:

1 - questions..
If you have any questions about content or anything at all, ask away I will be more than happy to help, if you feel like your under pressure just relax, take a breath and come to me, think of me as your free online tutor..

2 - everyone to share revision tips..
Share your last minute revision tips with everyone, help someone else out, answer a question if it unanswered.

I may take a while to reply but I will try my best to reply as question as I can.

Good luck guys!
Check out my other thread for similar exams next week.

Hey!

Could you please help me to work out the index of biodiversity using the Simpsons's formula. I needed help on question 7bi on the June 2012 paper, it is about the index of biodiversity.

Thanks!

May I ask what the Simpson's formula is or is it provided in the formula.

This thread is for:

1 - questions..
If you have any questions about content or anything at all, ask away I will be more than happy to help, if you feel like your under pressure just relax, take a breath and come to me, think of me as your free online tutor..

2 - everyone to share revision tips..
Share your last minute revision tips with everyone, help someone else out, answer a question if it unanswered.

I may take a while to reply but I will try my best to reply as question as I can.

Good luck guys!
Check out my other thread for similar exams next week.

Can someone help me with these two questions - q2b / q4a


http://web.archive.org/web/20100602033349/http://store.aqa.org.uk/qual/gce/pdf/AQA-BIOL2-W-QP-JUN09.PDF

http://web.archive.org/web/20100602033342/http://store.aqa.org.uk/qual/gce/pdf/AQA-BIOL2-W-MS-JUN09.PDF

I just dont get them. For q2b I know that only one strand of the DNA is coded but why? Q4b has made me go crazy!

I just don't get one annoying little thing:
How many different genera are shown in this diagram?

I've attached both questions - I understand the order of classicication, i just don't know what im counting!

Any help is appreciated,